UPS Freight Complaint

We had three individual pallets go out via UPS freight . The 3-pallet shipment pick up was confirmed by the UPS driver.

We paid the bill and about 2 months later received a "revised bill" for an oversize shipment saying we had ONE pallet greater than 12' linear footage. What? They UNLOADED OUR 3 PALLETS and REPALLETIZED THEM? WTF